This change removes the %AddProperty native JavaScript function from V8....

src/math.js

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 22 matching lines @@
 const $floor = MathFloor;
 const $random = MathRandom;
 const $abs = MathAbs;
 
 // Instance class name can only be set on functions. That is the only
 // purpose for MathConstructor.
 function MathConstructor() {}
 %FunctionSetInstanceClassName(MathConstructor, 'Math');
 const $Math = new MathConstructor();
 $Math.__proto__ = global.Object.prototype;
-%AddProperty(global, "Math", $Math, DONT_ENUM);
+%SetProperty(global, "Math", $Math, DONT_ENUM);
 
 // ECMA 262 - 15.8.2.1
 function MathAbs(x) {
   if (%_IsSmi(x)) {
     return x >= 0 ? x : -x;
   } else {
     return %Math_abs(ToNumber(x));
   }
 }
 
@@ skipping 65 matching lines @@
 
 // ECMA 262 - 15.8.2.18
 function MathTan(x) { return %Math_tan(ToNumber(x)); }
 
 
 // -------------------------------------------------------------------
 
 function SetupMath() {
   // Setup math constants.
   // ECMA-262, section 15.8.1.1.
-  %AddProperty($Math, "E", 2.7182818284590452354, DONT_ENUM |  DONT_DELETE | READ_ONLY);
+  %SetProperty($Math,
+               "E",
+               2.7182818284590452354,
+               DONT_ENUM |  DONT_DELETE | READ_ONLY);
   // ECMA-262, section 15.8.1.2.
-  %AddProperty($Math, "LN10", 2.302585092994046, DONT_ENUM |  DONT_DELETE | READ_ONLY);
+  %SetProperty($Math,
+               "LN10",
+               2.302585092994046,
+               DONT_ENUM |  DONT_DELETE | READ_ONLY);
   // ECMA-262, section 15.8.1.3.
-  %AddProperty($Math, "LN2", 0.6931471805599453, DONT_ENUM |  DONT_DELETE | READ_ONLY);
+  %SetProperty($Math,
+               "LN2",
+               0.6931471805599453,
+               DONT_ENUM |  DONT_DELETE | READ_ONLY);
   // ECMA-262, section 15.8.1.4.
-  %AddProperty($Math, "LOG2E", 1.4426950408889634, DONT_ENUM |  DONT_DELETE | READ_ONLY);
-  %AddProperty($Math, "LOG10E", 0.43429448190325176, DONT_ENUM |  DONT_DELETE | READ_ONLY);
-  %AddProperty($Math, "PI", 3.1415926535897932, DONT_ENUM |  DONT_DELETE | READ_ONLY);
-  %AddProperty($Math, "SQRT1_2", 0.7071067811865476, DONT_ENUM |  DONT_DELETE | READ_ONLY);
-  %AddProperty($Math, "SQRT2", 1.4142135623730951, DONT_ENUM |  DONT_DELETE | READ_ONLY);
+  %SetProperty($Math,
+               "LOG2E",
+               1.4426950408889634,
+               DONT_ENUM |  DONT_DELETE | READ_ONLY);
+  %SetProperty($Math,
+               "LOG10E",
+               0.43429448190325176,
+               DONT_ENUM |  DONT_DELETE | READ_ONLY);
+  %SetProperty($Math,
+               "PI",
+               3.1415926535897932,
+               DONT_ENUM |  DONT_DELETE | READ_ONLY);
+  %SetProperty($Math,
+               "SQRT1_2",
+               0.7071067811865476,
+               DONT_ENUM |  DONT_DELETE | READ_ONLY);
+  %SetProperty($Math,
+               "SQRT2",
+               1.4142135623730951,
+               DONT_ENUM |  DONT_DELETE | READ_ONLY);
 
   // Setup non-enumerable functions of the Math object and
   // set their names.
   InstallFunctions($Math, DONT_ENUM, $Array(
     "random", MathRandom,
     "abs", MathAbs,
     "acos", MathAcos,
     "asin", MathAsin,
     "atan", MathAtan,
     "ceil", MathCeil,
     "cos", MathCos,
     "exp", MathExp,
     "floor", MathFloor,
     "log", MathLog,
     "round", MathRound,
     "sin", MathSin,
     "sqrt", MathSqrt,
     "tan", MathTan,
     "atan2", MathAtan2,
     "pow", MathPow,
     "max", MathMax,
     "min", MathMin
   ));
 };
 
 
 SetupMath();